Transparency:
Transparency arises from the fact that there are multiple sources, nodes, verifying the blockchain data continuously. This feature of blockchain makes it prohibitively costly to attempt to interject a fraudulent transation and highly unlikely that an error can survive without detection.
Security:
Security arises from the same source as transparency, the distributed ledger with many “eyes” on the data. Thieves don’t normally make successful breakins where they are likely to be seen. Mistakes are quickly detected and remedied for the same reason.
Improved traceability:
Every transaction on a blockchain will have its own identifier. There is only one database distributed across many nodes and this makes it straightforward to locate all instances of a specific transaction across the blockchain.
Increased efficiency and speed:
Blockchain holds the potential to eliminate or decrease intermediate parties in many commercial transactions. As with all innovative technologies, inefficient processes are identifed and eliminated, such as paying bills online rather than through postal mail. Blockchain technology, for all the benefits already discussed, has the potential to eliminate vast amounts of now cumbersome, soon to be obsolete, intermediary processes.
Reduced cost:
Costs are obviously reduced as the needless complexity of intermediaries is reduced and eliminated.